Covers list_pull_requests, pull_request_read, pull_request_write, and pull_request_review_write, split out of the flat plugins/bin/skills/gitea PR-dispatch logic per ADR 0011. Composes gitea-labels-milestones for label/milestone ID resolution instead of duplicating that lookup. Tool signatures were cross-checked live via ToolSearch against the deployed gitea-mcp server rather than copied from api-reference.md, per the ADR's schema-drift mitigation process.